| Company | Timeline | Status | |
| Mark Williams Snooker Shop Limited Director • Professional Snooker Player  | 10 Jul 2023←2 Years 3 Months→Current  | Active  | |
| Mark Williams Snooker Limited Director • Professional Snooker Player  | 14 Dec 2011←13 Years→Current  | Active  | |
| Downing Film Partnership LLP Non-designated LLP Member • Unreported  | 2 Dec 2005←15 Years→5 Apr 2021  | Dissolved  | |
